Alright, let's work through 6624 times 8520 step by step
6624 × 8520 = 8520 × (6624)
+ 8520 × 4 yielding 34080
+ 8520 × 20 giving us 170400
+ 8520 × 600 which equals 5112000
+ 8520 × 6000 that is equal 51120000

= 56436480
